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Combined, the 2019 Top 40 Electrical Design Firms say they brought in $2.34 billion in 2018 designing and engineering the myriad electrical components of client projects. That revenue number was 6.4% higher than the $2.22 billion the 2018 Top 40 firms reported booking in 2017, which was 3.4% higher than that reported by the 2017 Top 40. Those two years of growth, though, were tepid compared to the 2016 Top 40’s 16% growth, and the 2015 Top 40’s 28% advance (numbers posted as the economy was in fast-acceleration mode coming out of the Great Recession of a decade ago).